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Werner H, Nogueira R, Lobo Lopes FPP. MR Imaging of Fetal Musculoskeletal Disorders. Magn Reson Imaging Clin N Am 2019; 26:631-644. [PMID: 30316472 DOI: 10.1016/j.mric.2018.06.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
This article outlines the main findings in prenatal musculoskeletal disorders. Three main technologies are generally used to obtain images within the uterus during pregnancy: ultrasound (US), MR imaging, and computed tomography (CT). Currently, the primary imaging method used for fetal assessment during pregnancy is US because it is patient friendly, useful, cost-effective, and (considered) safe. MR imaging is generally performed when US yields equivocal results because it offers additional information about fetal abnormalities and conditions in situations in which US is unable to provide high-quality images.
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Affiliation(s)
- Heron Werner
- Radiology Department, Clínica de Diagnóstico por Imagem (CDPI)/DASA, Avenida das Américas, 4666, sala 301B, Centro Médico BarraShopping, CDPI, Barra da Tijuca, Rio de Janeiro, RJ CEP: 22640-102, Brazil; Radiology Department, Alta Excelência Diagnóstica/DASA, Avenida das Américas, 4666, sala 301B, Centro Médico BarraShopping, CDPI, Barra da Tijuca, Rio de Janeiro, RJ CEP: 22640-102, Brazil.
| | - Renata Nogueira
- Radiology Department, Clínica de Diagnóstico por Imagem (CDPI)/DASA, Avenida das Américas, 4666, sala 301B, Centro Médico BarraShopping, CDPI, Barra da Tijuca, Rio de Janeiro, RJ CEP: 22640-102, Brazil; Radiology Department, Alta Excelência Diagnóstica/DASA, Avenida das Américas, 4666, sala 301B, Centro Médico BarraShopping, CDPI, Barra da Tijuca, Rio de Janeiro, RJ CEP: 22640-102, Brazil
| | - Flávia Paiva Proença Lobo Lopes
- Radiology Department, Clínica de Diagnóstico por Imagem (CDPI)/DASA, Avenida das Américas, 4666, sala 301B, Centro Médico BarraShopping, CDPI, Barra da Tijuca, Rio de Janeiro, RJ CEP: 22640-102, Brazil; Radiology Department, Alta Excelência Diagnóstica/DASA, Avenida das Américas, 4666, sala 301B, Centro Médico BarraShopping, CDPI, Barra da Tijuca, Rio de Janeiro, RJ CEP: 22640-102, Brazil; Radiology Department, Federal University of Rio de Janeiro (UFRJ), Rua Rodolpho Paulo Rocco, 255, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ CEP: 21941-913, Brazil
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Nogueira RDA, Werner Júnior H, Daltro P, Lima GM, Barbosa AD, Araujo Júnior E. The role of a novel magnetic resonance imaging sequence in the evaluation of the fetal skeleton: a pilot study. Radiol Bras 2018; 51:303-307. [PMID: 30369657 PMCID: PMC6198829 DOI: 10.1590/0100-3984.2017.0100] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Objective We aimed to study the role of magnetic resonance imaging (MRI), including a
novel MRI sequence-the modified volumetric interpolated breath-hold
examination (VIBE)-in the characterization of the fetal skeleton. This novel
sequence was useful for reconstructing three-dimensional images of the
skeleton. Materials and Methods We enrolled 22 pregnant women whose fetuses had shown congenital
abnormalities on ultrasound examinations. The women underwent prenatal fetal
MRI in a 1.5-T scanner with a T2-weighted modified VIBE sequence.
Three-dimensional reconstructions of the fetal skeleton were performed
manually on the instrument itself or via an interactive pen-tablet
workstation. Results Three-dimensional reconstructions of the fetal skeleton were performed after
the acquisition of modified VIBE MRI sequences, and it was possible to
characterize the fetal skeleton in all MRI examinations. Conclusion A detailed evaluation of the three-dimensional reconstructions of fetal
skeleton performed after acquisition of a modified VIBE MRI sequence allowed
a full characterization of the skeleton. However, improvements to the
proposed sequence should be addressed in future studies.
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Affiliation(s)
| | | | - Pedro Daltro
- Clínica de Diagnóstico Por Imagem (CDPI), Rio de Janeiro, RJ, Brazil
| | - Glaucia Macedo Lima
- Department of Maternal-Infant Care, Universidade Federal Fluminense (UFF), Niterói, RJ, Brazil
| | - Adauto Dutra Barbosa
- Department of Maternal-Infant Care, Universidade Federal Fluminense (UFF), Niterói, RJ, Brazil
| | - Edward Araujo Júnior
- Department of Obstetrics, Escola Paulista de Medicina da Universidade Federal de São Paulo (EPM-Unifesp), São Paulo, SP, Brazil
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Mello MA, Tuan RS. Effects of TGF-beta1 and triiodothyronine on cartilage maturation: in vitro analysis using long-term high-density micromass cultures of chick embryonic limb mesenchymal cells. J Orthop Res 2006; 24:2095-105. [PMID: 16955422 DOI: 10.1002/jor.20233] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Endochondral ossification is initiated by differentiation of mesenchymal cells into chondrocytes, which produce a cartilaginous matrix, proliferate, mature, and undergo hypertrophy, followed by matrix calcification, and substitution of cartilage by bone. A number of hormones and growth factors have been implicated in this process. Using in vitro, long-term, high-density, micromass cultures of chick embryonic mesenchyme, that recapitulate the process of chondrogenesis, chondrocyte maturation, and hypertrophy, we have investigated the importance of a balance between proliferation and apoptosis in cartilage maturation, focusing specifically on the effects of transforming growth factor-beta1 (TGF-beta1) and the thyroid hormone, triiodothyronine (T3). Our results showed that TGF-beta1 stimulates proliferation, by week 2 of culture, and T3 inhibits proliferation by week 3. Cell size increases in cultures treated with T3. Collagen type X is expressed in all culture, and delay in matrix deposition is seen only in the cultures treated with TGF-beta1. T3 stimulates alkaline phosphatase activity, but not calcification. T3 enhances apoptosis, as seen by TUNEL staining, and internucleosomal DNA fragmentation. The results support the roles of T3 and TGF-beta in cartilage maturation, i.e., TGF-beta stimulates proliferation and suppresses hypertrophy, while T3 stimulates hypertrophy and apoptosis.
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Affiliation(s)
- Maria A Mello
- Cartilage Biology and Orthopaedics Branch, National Institute of Arthritis, and Musculoskeletal and Skin Diseases, National Institutes of Health, Department of Health and Human Services, Building 50, Room 1523, MSC 8022, Bethesda, Maryland 20892-8022, USA
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Affiliation(s)
- Kimberly E Applegate
- Department of Radiology, Indiana University, Riley Hospital for Children, 702 Barnhill Rd, Rm 1053b, Indianapolis, IN 46202, USA.
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